Combined turning plug and check-valve.



comsman mums PLUG AND CHECK VALVE.

APPLICATION FILED NOV. 22,1915. I H

V Patented; Apr. '3, 191?.

in uh Wham COMBINED TURNING PLUG AND CHECK-VALVE.

Specification of Letters Patent.

Patented an; 3, 1m *7.

Application filed November 22, 1916. Serial No. 132,800.

To all whom it may concern: i

Be it known that l, (hummus M. WILSON, a citizen of the United States. and resident of Elmira. in the county of Chemung and State of New York, have invented certain ilLWhIld useful Improvements in Combined 'lurning Plugs and Check-Valves, of which the following is a specification.

The present invention relates to Water distribution and has particular reference to ne and useful improvements in a combined turning pl ug and check valve.

din object of my invention is to provide a valve having a turning plug and a check, said plug and check being adapted to cooperate when interposed in a conduit to either close communication or permit communication through the conduit.

Another object of my invention is to provide in combination with a turning plug valve a check valve whereby in the event that the device is interposed in a gas 'con-' duit or the like a failure of the gas floiv through the conduit would cause the check to automatically close, guarding against explosion due to escaping A further object of my invention is to provide a device of the character'described which is strong and durable, compact and heat in appearance, cheap to manufacture and install and effective in operation.

@ther objects and advantages to be derived from the use of my improved cmbined turning plug and check valve will apr pear from the following detailed description and the claims, taken with an inspection of the accompanying drawing, in

a top plan View of avalve einbo .lying the .iniprovernents of my invention;

2 is the same;

Fig 3 is an enlarged fragmental elevation of one end of the turning plug valve;

Fig.4 is a detail plan of the check'valve locking arm; and

Fig. 5 is a front elevation of the check valve. 4,

Referring more particularly to the drawing, wherein similar characters of reference designate like and corresponding parts throughout the various views, designates in. its entirety the val 'e casing of my invenlion, the same having alined extensions ll. and 12 provided with ducts l3 and H, re-

a lon itudinal sectional view of my invention includes spectively. -The ducts are threaded as at 15 to afford connection with a gas or otherv communication between the ducts l3 and:

the chamber 17 being controlled primarily by a turning plug 18 formed with the usual transverse opening 19. One end of the turning plug 19 is formed with a finger engaging element 20 to facilitate turning of the plug, and the other end of the plug is provided with a washer 2l'inaii'itaincd in position by means of a pin 22, said Washer and pin preventing i'vithdrawal of the turning plug or accidental displacement of the same.

Comnmnication between the chamber 17 and duct 14- is afforded by means of an opening 23 formed in a partition 2i disposed at one end of the chamber 17, said opening be ing closed by a flap or hinged check valve 25, said valve 25 having a lateral extension 26 on the upper end thereof, said extension being, hingedly mounted on a rod 27, said rod being carried by the free endivof a bolt 28, the casing being provided with a cylindrical enlargement 29 formed with a recess 30 to accommodate said rod 21', bolt 28 and the arm of the check valve. The outer face of the check valve is provided with a. substantially U-shaped outstanding flange or ridge 31, the upper ends of the ridge being curved as at 32 to form latch directing means for a purpose which will hereinafter appear.

The top Wall of the casing 10 is provided with a threaded opening closed by a threaded plug 33. The latch mechanism of a latch 'arm generally 34,-one end of said arm being a pin 35 mounted in a recess 36 designated pivoted on 111 said casing, the casing being enlarged the formation of said as at 37 to permit of recess. The arm 34 is provided with an en largement 39011 the under face thereof. said enlargement having sloping side portions 40 and ll to be engaged, at times. by a pin 42 radially extending from the turning plug); 18 and at right-anglesto the transverse opening 19 of said plug. The arm 34. is reresscd on its under face as at -l2 to accommmlate the pin when in the position shown in Fig. 2 so that said arm 34 may engage in the U- .shapcd Hang on the (lap valve 2: when said llil 46 and 47, the stop member 46 being preferably the head of the retaining pin or bolt for the latch arm 34.

- In operation, the normal position of the valve would be closed, that is, the flap valve 25 will be on its seat and the turning plug moved to the closed position. Under these conditions the pin 42 would be in the dotted line position shown 'in Fig. 2 and the latch arm will also be in the dotted line position shown in Fig. 2. When the turning plug is moved to the open position the pin 22 en-' gages the curved surface 41 of the projection 39 raising the latch arm 34 from engagement with the flap check valve 25 permitting said valve to be opened automatically by the flow of liquid through the ducts 14. I-Iowever, as the pin 42 passes the projection 39 the arm 34 is again allowed to descend, but at this time descends upon the check valve when the same is in the open position, and in view of the fact that the flow of liquid is of a pressure greater than the pressure. exerted by the weight of the arm and check valve, said valve will be maintained in the open position.

Assuming that the device is installed in a gas conduit for gas stoves or the like and that the flow of gas fails while the stove is burning the valve 25 would immediately move to the closed position. In view of the fact that the arm 34 is free at all times to move, said arm will immediately descend into the dotted line position engaging between the sides of the U-shaped flange 31 efi'ectively latching the valve against reopening, which would occur should the gas again flow before its first failure was detected. The recess 42 in the arm 34 permits of the action of said arm as described in the foregoing. When the user discovers that the gas flow has become automatically shut off owing to the failure of the flow at some particular time he will move the turning plug to the closed position, and if itis desired to obtain a further supply of gas the turning plug will again be moved to the open position duplicating the operation hereinbefore described and again permitting delivery of gas through a conduit to the burners of the stove. I desire to direct particular attention to the novel arrangement of the check valve and the turning plug, the same being arranged in a compact manner not occupying very much more space than occupied by the usual turning plug valve. The curved portions of the flange 31 serve to guide the blade of the arm 34 between sides of the flange.

From the above description taken in connection with the accompanying drawing, it is thouglitthat a clear and comprehensive understanding of the constructiop, operation and advantages of my invention may be had, and while I have shown and described the. device as embodying a specific structure, I desire that it be understood that such changes may be made in said structure as do not depart from the spirit and scope of the invention as claimed.

Having thus fully described my invention, what'I claim as new and desire to secure by Letters Patent, is:

1. In a device of the character described, a casing having communicating ducts there- I in, a turning plug mounted to control communication through one of the ducts, a flap check valve for controlling communication through the other duct, and a latch member controllable by said turning plug to engage said flap valve and maintain the same in closed position when said turning plug is in the closed position.

2. In a device of the class described, a casing having alining extensions formed with ducts, a turning plug mounted in one of the ducts, a flap valve controlling communication through the other ducts, a latch arm to maintain said flap valve in closed position, said latch arm being pivoted adjacent the turning plug, and an extension carried by said plug to remove the same from engagement with said flap valve.

3. In a device as specified, the combination with a casing having a turning plug valve, of a flap check valve mounted in said casing, a latch arm pivoted in said casing above said plug and adapted to engage said flap valve, and a pin carried by said plug to move said arm out of engagement with said flap valve.

4. In a device as specified, the combination wiih a casing having a turning plug valve therein, of a flap check valve, a latch arm pivoted in said casing above said turning plug, said latch arm having an enlargement.

on its under face midway its length, a pin carried by the plug to engage said enlargement, said latch arm being adapted to engage said flap valve, to maintain the same in closed position, and said latch arm being provided with a recess on its under face to accommodate said pin to permit movement of the latch arm Whenthe turning plug is in open position.

In testimony whereof, I affix my signature hereto.

CHARLES M. WILSON.

fiopiea or this patent may be obtained for five cents each, by addressing the "Commissioner or l'atentl,

Washington, D. 0." 

